Compressor-valve lifter



Jan. 12,1926. 1,569,671

F. W. PARSONS COMPRESSOR VALVE LIFTER Filed Jan. 22, 1925 HIS AT ORNEY J KMXM seamed Jan}. 12, i 1926.

Niran F F l C E DERIGK 'W. PARSONS, F ELMIRA, NEW YORK, ASSIGNOR TO INGERSOLL-RAND COIWIIIE'AN' Y, OF JERSEY CITY, JERSEY, A CORPORATION OF NEW JERSEY.

comransson-v'anvn Linnea.

Application filed January To all whom it may concern:

Beit known that I, FREDERICK W PAa sons, a citizen of theUnited States, and a resident of Elmira, county of Chemung, State of New York, have invented a certain tlompressor-Valve Lifter, of which the following is a specification, accompanied by rate within the recess.

drawings.

This invention relates to compressors, but more particularly to a mechanism for automatically holding open theinlet valve or valves of a compressor when thecompressed fluid within a storage receiver attains a certain predetermined pressure.

The objects of this invention are to improve upon valve lifters of this ty e, increase the certainty of operation, ren er the mechanism more positive in action, reduce the chance of leakage of pressure fluid, and secure a stronger and more rugged construction better able to withstand the strains an wear of constant usage.

Other objects will be in part obvious and will be in part pointed out in thefollowing specifications and description of the accompanying drawings.

Figure 1 is a vertical sectional elevation of acompressor valve lifter showing the position of the parts when. compressed fluid passes to the receiver, and I Figure 2 is a vertical sectional elevation of a compressor valve lifter showing the inlet valve unseated.

Referring to the drawings, a cylindrical cage A has a recess in its outer end, and a cylindrical guide'B is arranged to recipro- Disposed on the outer end of the cage A. is a circular flexible diaphragm C which is held in position and securely clamped at its outer edge by means of a cover plate D.

A valve mechanism, shown as an inlet valve, comprises in this instance a valve seat E arranged within a cylinder wall F and a guard plate G. A plate valve-H is clamped between the valve seat E and the guard plate G by a bolt J provided with a nut K. The cage A has a pluralit of legs L which rest upon a shoulder O o thevalve seat E, and serve to hold said valve seat firmlywithin the wall F when the cover plate D is clamped upon the outer edge of the cage .A. The cover plate D is preferably secured b means of stud bolts P provided with suita le nuts Q, A. plurality of legs R are secured to the D by means of screw threads. The guide 13 and the diaphragm C are 22, 1925. Serial No. $058.

under side of the guide B, and extend to a point near the plate valve H when the guide B is in normal retracted position. The le s ll are preferably clamped-between the gui e 12 and a spring seat S by means of a stud bolt T and a nut U. A pressure chamber V, formed by the diaphragm'C and the cover plate D, is at all times in communication with a storage receiver (not shown) through a pipe W which is secured to the cover plate held in a normally retracted or outward position against the cover plate D, by a spring X, in this instance, disposed between the guide B and the valve seat E. The compressing element comprises a compressing chamber Y containing a suitable piston (not shown).

' spring X will be overcome, and the endsof the fingers R will bearagainst the valve H,

'tbus unseating said valve. The valve will be held open until the pressure within the receiver is sufficiently reduced to permit the spring X to raise the fingers R, whereupon the valve H will return to its seat and the air compressed in the compressing chamber ceiver.

I claim:

1. Means for actuating a plate valve lifter for compressors o'fthe type in which fingers extending outwardly and downwardly bear upon the valve, comprising a cylindrical cage adapted to fit in the cylinder jacket and to fit over and bear upon the valveassembly, a cover plate adapted to be bolted upon the cylinder jacket and to bear upon and hold the said cage in position, a'recess inthe upper part of said cage, a cylindrical piston adapted to fit loosely in said recess, a flexible diaphragm held clamped between the side walls of the'said cage and the said cover plate overand in contact with said piston,

Y will be discharged into the storage re- .a valve litter of the type described. operably cage adapted to fit mounted in the lower part of said cage, and connecting means between the saicl valve lifter and the said cylindrical pistomlhe assembly being such that the expansion of the saiol diaphragm will force the said piston downwardly and will actuate the "valve lifter.

2. Means for actuating a 1 late valve for compressors of line type in W-liicla fingers extending outwardly and downwardly bear upon the valve, comprising a cylindrical over and upon the seat of a plate valve, a cover plate adapteel to be bolted to the cylinder jacket and to hold the part of said c eeann said cage in fixecl ielation to 'lhe said. plate valve. :1 (liapln'agn i held between said cylincll ical cage and the cover plate and actuated by pressure finial entering through the sairl cover, a piston lie .ng loosely on the upper diaphragm, a late lifter of the type (lesc-iibecl operably monnlzeel. in the lower pawl; of said cage and ns "for suiizably connecting the said "vale 'iter lo the sai piston. ln testimony Whe'leof have signecl lihis specification.

we and nesponsive to said 

